This alien vine has been widely planted and escaped in southeastern states (FNA 3). It spreads vegetatively with running roots, persisting in abandoned gardens. Spread from seed has been suggested but perhaps not proven (CW). The species can become somewhat woody and semi-evergreen, but in Ky. these features are restricted to more sheltered sites. Its foliage may be avoided by deer and other mammalian herbivores, partly due to its acrid taste. Flowering mostly occurs during Jul-Sep but it may occur as late as Oct-Nov in urban areas (2024).